package cn.wolfcode.util;

import cn.wolfcode.qo.JsonResult;
import com.alibaba.fastjson.JSON;
import org.apache.shiro.authz.UnauthorizedException;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.method.HandlerMethod;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@ControllerAdvice
public class ControllerExceptionHandler {

    @ExceptionHandler(RuntimeException.class)
    public Object handler(RuntimeException e, Model model, HttpServletResponse response, HandlerMethod handlerMethod) throws IOException {
        //方便开发时找bug
        e.printStackTrace();
        //判断如果是ajax对应的方法,就返回JsonResult(判断是否有ResponseBody注解)
        if (handlerMethod.hasMethodAnnotation(ResponseBody.class)) {
            response.setContentType("application/json;charset=utf-8");
            response.getWriter().println(JSON.toJSONString(new JsonResult(false, "操作失败")));
            return null;
        } else {
            model.addAttribute("e",e);
            //如果不是，就返回错误的试图页面
            return "common/error";
        }
    }

    /**
     * 捕获没有权限的异常
     * @param e
     * @param response
     * @param handlerMethod
     * @return
     * @throws IOException
     */
    @ExceptionHandler(UnauthorizedException.class)
    public Object handlerUnauthorized(RuntimeException e, HttpServletResponse response, HandlerMethod handlerMethod) throws IOException {
        //方便开发时找bug
        e.printStackTrace();
        //判断如果是ajax对应的方法,就返回JsonResult(判断是否有ResponseBody注解)
        if (handlerMethod.hasMethodAnnotation(ResponseBody.class)) {
            response.setContentType("application/json;charset=utf-8");
            response.getWriter().println(JSON.toJSONString(new JsonResult(false, "您没有权限操作")));
            return null;
        } else {
            //如果不是，就返回错误的试图页面
            return "common/nopermission";
        }
    }
}
